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A curated list of amazingly awesome open source sysadmin resources.

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[ Daily / Weekly / Overview ]

Feb 04, 2023

Software / Mail Clients

• Thunderbird - Free email application that's easy to set up and customize. (Source Code)

Feb 02, 2023

Software / Monitoring

• Alerta - Distributed, scaleable and flexible monitoring system. (Source Code (⭐2.2k)) Apache-2.0 Python

• Healthchecks - Monitoring for cron jobs, background services and scheduled tasks. (Source Code (⭐5.9k)) BSD-3-Clause Python

• Linux Dash (⭐10k) - A low-overhead monitoring web dashboard for a GNU/Linux machine. MIT Nodejs/Go/Python/PHP

• Sensu - Monitoring tool for ephemeral infrastructure and distributed applications. (Source Code (⭐845))

Jan 27, 2023

Software / ChatOps

• Errbot - a plugin based chatbot designed to be easily deployable, extensible and maintainable. (Source Code (⭐2.9k)) GPL-3.0 Python

Jan 26, 2023

Software / Continuous Integration & Continuous Deployment

• Woodpecker - Community fork of Drone that uses Docker containers. (Source Code (⭐2.1k)) Apache-2.0 Go

Software / Router

• DD-WRT - A Linux-based firmware for wireless routers and access points, originally designed for the Linksys WRT54G series. (Source Code) GPL-2.0 C

• OpenWrt - A Linux-based router featuring Mesh networking, IPS via snort and AQM among many other features. (Source Code) GPL-2.0 C

• OPNsense - An open source FreeBSD-based firewall and router with traffic shaping, load balancing, and virtual private network capabilities. (Source Code) BSD-2-Clause C PHP

Jan 20, 2023

Software / Control Panels

• Cockpit - web-based graphical interface for servers. (Source Code (⭐7.8k)) LGPL-2.1 C

• ISPConfig - Manage Linux servers directly through your browser. (Source Code) BSD-3-Clause PHP

• Sentora - Open-Source Web hosting control panel for Linux, BSD (fork of ZPanel). (Source Code (⭐594)) GPL-3.0 PHP

• VestaCP - Open-Source hosting control panel. (Source Code (⭐2.7k)) GPL-3.0 PHP/Shell/Other

• Virtualmin - Powerful and flexible web hosting control panel for Linux and BSD systems. (Source Code) GPL-3.0 Shell/Perl/Other

• Webmin - Web-based interface for system administration for Unix. (Source Code (⭐2.3k)) BSD-3-Clause Perl

Software / DNS - Control Panels

• nsedit (⭐191) - nsedit is a DNS editor for PowerDNS, working with PowerDNS's new API.

• PDNS Gui (⭐26) - WebGUI which aids in administering domains and records for PowerDNS with MySQL.

• Pi-hole - A blackhole for Internet Advertisements with a gui for managing and monitoring

• Poweradmin - Friendly web-based DNS administration tool for PowerDNS server.

Software / DNS - Domain Management

• DNSControl - Synchronize your DNS to multiple providers from a simple DSL. (Source Code (⭐2.5k)) MIT Go/Docker

Software / Metric & Metric Collection

• Collectors only
  • Collectd - System statistic collection daemon.
  • Collectl - High precision system performance metrics collecting tool.
  • Diamond (⭐1.7k) - Python based statistic collection daemon.
  • Statsd (⭐17k) - Application statistic listener.
  • tcollector - System statistic collection daemon written in Python for OpenTSDB
  • Telegraf (⭐12k) - The plugin-driven server agent for collecting & reporting metrics.

• Dashboards
  • Dashing - Ruby gem that allows for rapid statistical dashboard development. An all HTML5 approach allows for big screen displays in data centers or conference rooms.
  • Facette - Time series data visualization and graphing software written in Go.
  • Freeboard (⭐6.3k) - A damn-sexy front-end real-time dashboard for the internet of things. Transforms raw JSON into delicious UI.
  • Ganglia - High performance, scalable RRD based monitoring for grids and/or clusters of servers. Compatible with Graphite using a single collection process.
  • Grafana - A Graphite & InfluxDB Dashboard and Graph Editor.
  • RRDtool - Industry standard, high performance data logging and graphing system for time series data.

• Storage
  • InfluxDB - Distributed time series database with no external dependencies.
  • KairosDB (⭐1.7k) - Fast distributed scalable time series database, fork of OpenTSDB 1.x.
  • OpenTSDB - Store and server massive amounts of time series data without losing granularity.

Software / Software Containers

• Docker Compose - Define and run multi-container Docker applications.

• Docker Swarm - Manage cluster of Docker Engines.

• LXD – a container "hypervisor" and a better UX for LXC.

• Portainer - Simple management UI for Docker.

Dec 18, 2022

List of Licenses / Web

• AGPL-3.0 - GNU Affero General Public License 3.0

• Apache-2.0 - Apache, Version 2.0

• BSD-2-Clause - BSD 2-clause "Simplified"

• BSD-3-Clause - BSD 3-Clause "New" or "Revised"

• GPL-2.0 - GNU General Public License 2.0

• GPL-3.0 - GNU General Public License 3.0

• MIT - MIT License

• MPL-2.0 - Mozilla Public License

Nov 14, 2022

Software / Web

• Traefik - Traefik is a leading modern reverse proxy and load balancer.

Nov 04, 2022

Software / Identity Management - Single Sign-On (SSO)

• KeyCloak - Open Source Identity and Access Management. (Source Code (⭐15k)) Apache-2.0 Java

Oct 13, 2022

Software / Cloud Orchestration

• Nomad - Simple and flexible orchestrator for Docker, Podman, executables, Java, and QEMU - (Source Code (⭐13k), Documentation) MPL-2.0 Go

Oct 09, 2022

Software / Editors

• Atom Community (⭐548) - A fork of atom (⭐59k) A hackable text editor from Github.

Software / Remote Management

• Tiger VNC - TigerVNC is a high-performance, platform-neutral implementation of VNC (Virtual Network Computing), a client/server application that allows users to launch and interact with graphical applications on remote machines.

Oct 06, 2022

Software / Editors

• VSCodium (⭐19k) - An open source cross-platform extensible code editor based on VS Code by Microsoft removing their non-free additions.

Software / Packaging

• aptly - Swiss army knife for Debian repository management. (Source Code (⭐2.3k)) MIT Go

Sep 30, 2022

Software / Monitoring

• checkmk - Comprehensive solution for monitoring of applications, servers, and networks. (Source Code (⭐936)) Python/PHP

Sep 21, 2022

Software / IT Asset Management

• OCS Inventory NG - Asset management and deployment solution for all devices in your IT Department. (Source Code) GPL-2.0 PHP/Perl

• OPSI - Hardware and software inventory, client management, deployment, and patching for Linux and Windows. (Source Code) GPL-3.0/AGPL-3.0 OVF/Python

• RackTables - Datacenter and server room asset management like document hardware assets, network addresses, space in racks, networks configuration. (Source Code (⭐642), Demo) GPL-2.0 PHP

• Ralph - Asset management, DCIM and CMDB system for large Data Centers as well as smaller LAN networks. (Source Code (⭐1.9k), Demo (⭐1.9k)) Apache-2.0 Python/Docker

• Snipe IT - Asset & license management software. (Source Code (⭐7.3k)) AGPL-3.0 PHP

Sep 14, 2022

Software / Metric & Metric Collection

• Packages
  • Graphite - Scalable graphing server.
  • Packetbeat - Captures network traffic and displays it in a custom Kibana dashboard for easy viewing.
  • Prometheus - Service monitoring system and time series database.
  • VictoriaMetrics (⭐7.9k) - Service monitoring system and time series database.

Jul 12, 2022

Software / Monitoring

• Scrutiny (⭐2.3k) - Hard Drive S.M.A.R.T Monitoring, Historical Trends & Real World Failure Thresholds

May 27, 2022

Software / VPN

• Headscale (⭐10k) - Self-hostable fork of Tailscale, cross-platform clients, simple to use, built-in (currently experimental) monitoring tools.

Feb 20, 2022

Software / Monitoring

• Icinga - Nagios fork that has since lapped nagios several times. Comes with the possibility of clustered monitoring. (Source Code (⭐1.8k)) GPL-2.0 C++

Jan 31, 2022

Software / VPN

• Firezone - WireGuard based VPN Server and Firewall.

Jan 19, 2022

Software / Identity Management - Tools and web interfaces

• ZITADEL (⭐2.3k) - Cloud-native Identity & Access Management solution providing a platform for secure authentication, authorization and identity management.

Dec 18, 2021

Software / Log Management

• Loki - horizontally-scalable, highly-available, multi-tenant log aggregation system inspired by Prometheus.

Nov 15, 2021

Software / Backups

• Backupninja - Lightweight, extensible meta-backup system.

Oct 11, 2020

Software / Distributed Filesystems

• Perkeep (née Camlistore) - A set of open source formats, protocols, and software for modeling, storing, searching, sharing and synchronizing data.

Oct 10, 2020

Software / Continuous Integration & Continuous Deployment

• CDS - Enterprise-Grade Continuous Delivery & DevOps Automation Open Source Platform. (Source Code (⭐4.1k)) BSD-3-Clause Go

Jul 20, 2020

Software / Continuous Integration & Continuous Deployment

• werf - Open Source CI/CD tool for building Docker images and deploying to Kubernetes via GitOps. (Source Code (⭐3.5k)) Apache-2.0 Go

Jun 29, 2020

Software / VPN

• Nebula (⭐11k) - A scalable p2p VPN with a focus on performance, simplicity and security.

Jun 20, 2020

Software / Distributed Filesystems

• Minio - Minio is an open source object storage server compatible with Amazon S3 APIs. (Source Code (⭐37k)) Apache-2.0 Go

Jun 16, 2020

Software / Monitoring

• Bloonix - Bloonix is a monitoring solution that helps businesses to ensure high availability and performance. (Source Code) GPL-3.0 Perl

Software / Web

• Apache - A robust, commercial-grade, featureful implementation of an HTTP (Web) server.

May 12, 2020

Software / Diagramming

• Diagrams.net - A.K.A. Draw.io. Easy to use Diagram UI with a plethora of templates.

May 04, 2020

Software / Diagramming

• DrawThe.Net - Javascript tool that uses a YAML-formatted input to programmatically create large, complex, and visually solid diagrams.

• Mermaid - Javascript module with a unique, easy, shorthand syntax. Integrates into several other tools like Grafana.

Apr 09, 2020

Software / VPN

• WireGuard - Very fast VPN based on elliptic curve and public key crypto.

Mar 14, 2020

Software / Continuous Integration & Continuous Deployment

• Concourse - Concourse is a CI tool that treats pipelines as first class objects and containerizes every step along the way. (Demo, Source Code (⭐6.7k)) Apache-2.0 Go

Nov 14, 2019

Software / IT Asset Management

• GLPI - Information Resource-Manager with an additional Administration Interface. (Source Code (⭐3k))

Nov 13, 2019

Software / DNS - Domain Management

• octoDNS (⭐2.6k) - DNS as code - Tools for managing DNS across multiple providers. MIT Python

Nov 08, 2019

Software / Build and software organization tools

• Spack - A flexible package manager that supports multiple versions, configurations, platforms, and compilers.

Oct 28, 2019

Software / Monitoring

• Netdata - Distributed, real-time, performance and health monitoring for systems and applications. Runs on Linux, FreeBSD, and MacOS. (Source Code (⭐62k)) GPL-3.0 C

Sep 30, 2019

Software / Virtualization

• XCP-ng - Based on Citrix XenServer, XCP-ng is a fully open source virtualization platform.

Sep 16, 2019

Software / Identity Management - Tools and web interfaces

• Smallstep Certificates - A private certificate authority (X.509 & SSH) and related tools for secure automated certificate management.

Jul 20, 2019

Software / Backups

• BackupPC - BackupPC is a high-performance system for backing up to disk.

Jul 19, 2019

Software / Automation

• Bolt - You can use Bolt to run one-off tasks, scripts to automate the provisioning and management of some nodes, you can use Bolt to move a step beyond scripts, and make them shareable.

Jul 17, 2019

Software / Backups

• Duplicati - Multiple backends, encryption, web-ui and multi-OS backup tool.

Software / Identity Management - Tools and web interfaces

• easy-rsa (⭐3.4k) - bash script to build and manage a PKI CA.

Repositories / Web

• deb.sury.org - Repository with LAMP updated packages for Debian and Ubuntu.

May 08, 2019

Software / Identity Management - Tools and web interfaces

• Pomerium - An identity and context aware access-proxy inspired by BeyondCorp.

Mar 10, 2019

Software / Continuous Integration & Continuous Deployment

• Buildbot - Python-based toolkit for continuous integration. (Source Code (⭐5k)) GPL-2.0 Python

• CapsuleCD - CD script for automating package/library releases (npm, cookbooks, gems, pip, jars, etc). (Source Code (⭐96)) MIT Go

• drone - Drone is a Continuous Delivery platform built on Docker, written in Go. (Source Code (⭐26k)) Apache-2.0 Go

• Factor - Programmatically define and run workflows to connect configuration management, source code management, build, continuous integration, continuous deployment and communication tools. (Source Code (⭐81)) MIT Ruby

• GitLab CI - Gitlab's built-in, full-featured CI/CD solution. (Source Code) MIT Ruby

• GoCD - Continuous delivery server. (Source Code (⭐6.7k)) Apache-2.0 Java/Ruby

• GolangCI - Open Source automated code review service for Go integrated with GitHub pull requests. (Source Code (⭐54)) AGPL-3.0 Go

• Jenkins - Continuous Integration Server. (Source Code (⭐20k)) MIT Java

• Laminar - Fast, lightweight, simple and flexible Continuous Integration. (Source Code (⭐243)) GPL-3.0 C++

• PHP Censor (⭐660) - Open source self-hosted continuous integration server for PHP projects. BSD-2-Clause PHP

• PHPCI - Free and open source continuous integration specifically designed for PHP. (Source Code (⭐2.4k)) BSD-2-Clause PHP

• Strider - Open Source Continuous Deployment / Continuous Integration platform. (Source Code (⭐4.6k)) MIT Nodejs

Feb 14, 2019

Software / Monitoring

• NetXMS - Open Source network and infrastructure monitoring and management. (Source Code (⭐133)) LGPL-3.0/GPL-3.0 Java/C++/C

Dec 28, 2018

Software / DNS - Servers

• CoreDNS - Flexible DNS server written on Go.

Sep 24, 2018

Software / Software Containers

• Docker - Platform for developers and sysadmins to build, ship, and run distributed applications.

Aug 31, 2018

Software / Version control

• Darcs - Patch-based distributed version control (more info: wiki)

Jul 28, 2018

Software / Monitoring

• EdMon (⭐4) - A command-line monitoring application helping you to check that your hosts and services are available, with notifications support. MIT Java

May 22, 2018

Software / Identity Management - Tools and web interfaces

• OpenID Connect - A Simple Identity layer on top of OAuth 2.0.

Apr 12, 2018

Software / Backups

• Restic - Secure, remote backup tool. Designed to be easy, fast, verifiable and efficient.

Apr 06, 2018

Software / VPN

• sshuttle (⭐9.5k) - Poor man's VPN.

Feb 01, 2018

Software / Log Management

• Hindsight - Stream processing system which may be used for log aggregation (Replaces Heka).

Jan 28, 2018

Software / Editors

• Micro - A modern and intuitive terminal-based text editor

Jan 27, 2018

Software / Backups

• rclone - a command line program to sync files and directories to and from several cloud storage systems/providers.

Jan 10, 2018

Software / Cloud Orchestration

• StackStorm - Event Driven Operations and ChatOps platform for infrastructure management. Written in Python.

• Terraform - Terraform works with many cloud providers and creates infrastructure from code.

Dec 01, 2017

Software / Automation

• Apache Ant - Automation build tool, similar to make, written in Java.

• Apache Maven - Build automation tool mainly for Java.

• Bazel - Google's build system.

• GNU Make - The most popular automation build tool for many purposes.

• Gradle - Another build automation system.

• Rake (⭐2.2k) - Build automation tool similar to Make, written in and extensible in Ruby.

Software / Backups

• Amanda - Client-server model backup tool.

• Bareos - A fork of Bacula backup tool.

• Barman - Backup and Recovery Manager for disaster recovery of PostgreSQL servers.

• BorgBackup (⭐9.1k) - A fork of Attic deduplicating backup program written in Python.

• Burp - Network backup and restore program.

• DREBS (⭐35) - AWS EBS backup script that supports strategies.

• Duplicity - Encrypted bandwidth-efficient backup using the rsync algorithm.

• Elkarbackup (⭐356) - Backup solution based on RSnapshot with a simple web interface

• Rdiff-backup - An easy A remote incremental backup of all your files.

• Rsnapshot - Filesystem Snapshotting Utility.

• Shield (⭐293) - A pluggable architecture for backup and restore of database systems.

• Snebu – Snapshot backup with global multi-client deduplication and transparent compression.

• UrBackup - Another client-server backup system.

• ZBackup - A versatile deduplicating backup tool.

Software / Build and software organization tools

• EasyBuild - EasyBuild builds software and modulefiles for High Performance Computing (HPC) systems in an efficient way.

• environment-modules Lmod - Lmod is a Lua based module system that easily handles the MODULEPATH Hierarchical problem.

• HPCBIOS - HPCBIOS is an effort to setup a common, well-documented and reproducible, environment spanning across multiple HPC systems & sites, inclusive of documentation.

Software / ChatOps

• Eggdrop - The oldest Internet Relay Chat (IRC) bot still in active development. (Source Code (⭐429)) GPL-2.0 C

• Hubot - A customizable, life embetterment robot. (Source Code (⭐16k)) MIT Nodejs

Software / Client management

• Chocolatey – The package manager for Windows. (Source Code (⭐8.8k)) Apache-2.0 C#/PowerShell

Software / Cloning

• Clonezilla - Partition and disk imaging/cloning program. (Source Code) GPL-2.0/Other Perl/Shell/Other

• Fog - Cloning/imaging solution/rescue suite. (Sorce Code (⭐842)) GPL-3.0 PHP/Shell

Software / Cloud Computing

• CloudStack - Cloud computing software for creating, managing, and deploying infrastructure cloud services. (Source Code (⭐1.3k))

• Cobbler - Cobbler is a Linux installation server that allows for rapid setup of network installation environments. (Source Code (⭐2.4k))

• Mesos - Develop and run resource-efficient distributed systems.

• Openshift - PaaS product from Red Hat.

• OpenStack - Build private and public clouds.

• The Foreman - Complete lifecycle management tool for physical and virtual servers. FOSS.

• Tsuru - Tsuru is an extensible Platform as a Service software.

Software / Virtualization

• OpenNebula - Flexible enterprise cloud made simple.

• Archipel - XMPP based virtualization management platform.

• ConVirt - Provides the core functionality for centrally managing your KVM or Xen virtualized environment.

• Ganeti - Cluster virtual server management software tool built on top of KVM and Xen.

• KVM - Linux kernel virtualization infrastructure.

• OpenNode - Builds open-source infrastructure management software and implements cloud systems.

• oVirt - Manages virtual machines, storage and virtual networks.

• Packer - A tool for creating identical machine images for multiple platforms from a single source configuration.

• Proxmox VE - Virtualization management solution.

• QEMU - QEMU is a generic machine emulator and virtualizer.

• Vagrant - Tool for building complete development environments.

• VirtualBox - Virtualization product from Oracle Corporation.

• Xen - Virtual machine monitor for 32/64 bit Intel / AMD (IA 64) and PowerPC 970 architectures.

Software / Cloud Orchestration

• BOSH - IaaS orchestration platform originally written for deploying and managing Cloud Foundry PaaS, but also useful for general purpose distributed systems.

• Cloud Foundry - A Platform-as-a-Service suite to provide the orchestration services that make distributed apps a powerhouse of awesomeness.

• Cloudify - TOSCA-based cloud orchestration software platform written in Python and YAML.

• CloudSlang - Flow-based orchestration tool for managing deployed applications, with Docker capabilities.

• Genesis (⭐54) - A template framework for multi-environment BOSH deployments.

• Juju - Cloud orchestration tool which manages services as charms, YAML configuration and deployment script bundles.

• Kubernetes - Orchestration system for Docker containers - (Source Code (⭐96k), Documentation) Apache-2.0 Go

• MCollective - Ruby framework to manage server orchestration, developed by Puppet labs.

• Overcast - Deploy VMs across different cloud providers, and run commands and scripts across any or all of them in parallel via SSH.

• Rundeck - Simple orchestration tool.

• Spruce (⭐369) - A tool that merges separate YAML files into one. Works well with Genesis (⭐54).

Software / Configuration Management

• Salt - It's written in Python.

• Ansible - It's written in Python and manages the nodes over SSH.

• CFEngine - Lightweight agent system. Configuration state is specified via a declarative language.

• Chef - It's written in Ruby and Erlang and uses a pure-Ruby DSL.

• Pallet - Infrastructure definition, configuration and management via a Clojure DSL.

• Puppet - It's written in Ruby and uses Puppet's declarative language or a Ruby DSL.

Software / Code Review

• Gerrit - Based on the Git version control, it facilitates software developers to review modifications to the source code and approve or reject those changes.

• Phabricator - Code review tool build by facebook and used by WikiMedia, FB, dropbox etc. Comes with an integrated wiki, bug tracker, VC integration and a CLI tool called arcanist.

• Review Board - Available as free software under the MIT License.

Software / Configuration Management Database

• Collins - At Tumblr, it's the infrastructure source of truth and knowledge.

• i-doit - IT Documentation and CMDB.

• iTop - Complete ITIL web based service management tool.

• netbox (⭐12k) - IP address management (IPAM) and data center infrastructure management (DCIM) tool

Software / Control Panels

• Ajenti - Control panel for Linux and BSD. (Source Code (⭐7k)) MIT Python/Shell

• Froxlor - Lightweight server management software with Nginx and PHP-FPM support. (Source Code (⭐1.5k)) GPL-2.0 PHP

Software / Deployment Automation

• Capistrano - Deploy your application to any number of machines simultaneously, in sequence or as a rolling set via SSH (rake based).

• Fabric - Python library and cli tool for streamlining the use of SSH for application deployment or systems administration tasks.

• Mina - Really fast deployer and server automation tool (rake based).

• munki - Webserver-based repository of packages and package metadata, that allows macOS administrators to manage software installs.

• Vlad the Deployer (⭐353) - Deployment automation (rake based).

Software / Distributed Filesystems

• Ceph - Distributed object store and file system.

• DRBD - Distributed Replicated Block Device.

• GlusterFS - Scale-out network-attached storage file system.

• Go IPFS (⭐15k) - Implementation of IPFS, a global, versioned, peer-to-peer filesystem that seeks to connect all computing devices with the same system of files.

• HDFS - Distributed, scalable, and portable file-system written in Java for the Hadoop framework.

• LeoFS - Unstructured object/data storage and a highly available, distributed, eventually consistent storage system.

• Lustre - Parallel distributed file system, generally used for large-scale cluster computing.

• MooseFS - Fault tolerant, network distributed file system.

• OpenAFS - Distributed network file system with read-only replicas and multi-OS support.

• SheepDog - A distributed Blockdevice, Rest, QEMU and distributed Filesystem storage.

• Swift - A highly available, distributed, eventually consistent object/blob store.

• TahoeLAFS - secure, decentralized, fault-tolerant, peer-to-peer distributed data store and distributed file system.

• XtreemFS - XtreemFS is a fault-tolerant distributed file system for all storage needs.

Software / DNS - Servers

• Bind - The most widely used name server software.

• Designate - DNS REST API that support several DNS servers as its backend.

• djbdns - A collection of DNS applications, including tinydns.

• dnsmasq - A lightweight service providing DNS, DHCP and TFTP services to small-scale networks.

• Knot - High performance authoritative-only DNS server.

• NSD - Authoritative only, high performance, simple name server.

• PowerDNS - DNS server with a variety of data storage back-ends and load balancing features.

• Unbound - Validating, recursive, and caching DNS resolver.

• Yadifa - Lightweight authoritative Name Server with DNSSEC capabilities powering the .eu top-level domain.

Software / DNS - Control Panels

• Atomia DNS - DNS management system.

Software / DNS - Domain Management

• DomainMOD - Manage your domains and other internet assets in a central location. (Source Code) GPL-3.0 PHP

Software / Editors

• Brackets - Code editor for web designers and front-end developers.

• Eclipse - IDE written in Java with an extensible plug-in system.

• Geany - GTK2 text editor.

• GNU Emacs - An extensible, customizable text editor-and more.

• Haroopad - Markdown editor with live preview.

• ICEcoder - Code editor awesomeness, built with common web languages.

• jotgit (⭐206) - Git-backed real-time collaborative code editing.

• KDevelop - IDE by the people behind KDE.

• Nano - Easy to use, customizable text editor.

• Notepad++ - GPLv2 multi-language editor with syntax highlighting for Windows.

• TextMate (⭐14k) - A graphical text editor for OS X.

• Vim - A highly configurable text editor built to enable efficient editing.

Software / Identity Management - LDAP

• 389 Directory Server - Developed by Red Hat.

• Apache Directory Server - Apache Software Foundation project written in Java.

• FreeIPA - Based on 389-DS. Includes Kerberos, DNS, as well as host based access control.

• FreeRADIUS - High performance and highly configurable multi-protocol policy/authentication server, supporting RADIUS, DHCPv4 and VMPS.

• OpenDJ - Fork of OpenDS.

• OpenDS - Another directory server written in Java.

• OpenLDAP - Developed by the OpenLDAP Project.

Software / Identity Management - Tools and web interfaces

• BounCA - A personal SSL Key / Certificate Authority web-based tool for creating self-signed certificates.

• Fusion Directory - Improve the Management of the services and the company directory based on OpenLDAP.

• Indieauth - Sign in with your domain name (using the rel-me-auth protocol).

• LDAP Account Manager (LAM) - Web frontend for managing entries (e.g. users, groups, DHCP settings) stored in an LDAP directory.

• Libravatar - Libravatar is a service which delivers your avatar (profile picture) to other websites.

• OSIAM - Secure identity management solution providing REST based services for authentication and authorization.

• Samba – Active Directory and CIFS protocol implementation.

Software / Log Management

• Elasticsearch - A Lucene Based Document store mainly used for log indexing, storage and analysis.

• Fluentd - Log Collector and Shipper.

• Flume - Distributed log collection and aggregation system.

• GoAccess - Real-time web log analyzer and interactive viewer that runs in a terminal or through the browser. (Source Code (⭐16k)) MIT C

• Graylog - Pluggable Log and Event Analysis Server with Alerting options.

• Kibana - Visualize logs and time-stamped data.

• Logstash - Tool for managing events and logs.

• Octopussy - Log Management Solution (Visualize / Alert / Report).

Software / Mail Clients

• Claws Mail - Old school email client (and news reader), based on GTK+. (Source Code)

• ImapSync – Simple IMAP migration tool for copying mailboxes to other servers. (Source Code (⭐2.7k))

• Mutt - Small but very powerful text-based mail client. (Source Code)

• Sylpheed – Still developed predecessor to Claws Mail, lightweight mail client. (Source Code (⭐61))

Software / Monitoring

• Adagios - Web based Nagios interface for configuration and monitoring (replacement to the standard interface), and a REST interface. (Source Code (⭐331)) AGPL-3.0 Docker/Python

• Bosun - Monitoring and alerting system by Stack Exchange (Source Code (⭐3.3k)) MIT Go

• Cabot - Monitoring and alerts, similar to PagerDuty. (Source Code (⭐5.4k)) MIT Python

• Cacti - Web-based network monitoring and graphing tool. (Source Code (⭐1.3k)) GPL-2.0 PHP

• cadvisor (⭐14k) - Analyzes resource usage and performance characteristics of running containers (Source Code (⭐14k)) Apache-2.0 Go

• eZ Server Monitor - A lightweight and simple dashboard monitor for Linux, available in Web and Bash application. (Source Code (⭐329)) GPL-3.0 PHP/Shell

• LibreNMS - Fully featured network monitoring system that provides a wealth of features and device support. (Source Code (⭐3k)) GPL-3.0 PHP

• Monit - Small utility for managing and monitoring Unix systems. (Source Code) AGPL-3.0 C

• Munin - Networked resource monitoring tool. (Source Code (⭐1.7k)) GPL-2.0 Perl/Shell

• Naemon - Network monitoring tool based on the Nagios 4 core with performance enhancements and new features. (Source Code (⭐132)) GPL-2.0 C

• Nagios - Computer system, network and infrastructure monitoring software application. (Source Code (⭐1.2k)) GPL-2.0 C

• Observium - SNMP monitoring for servers and networking devices. Runs on linux.

• OMD - The Open Monitoring Distribution.

• Performance Co-Pilot - Lightweight, distributed system performance and analysis framework.

• PHP Server Monitor - Open source tool to monitor your servers and websites. (Source Code (⭐2.1k))

• PhpSysInfo - A customizable PHP script that displays information about your system nicely. (Source Code (⭐1.3k))

• pyDash - Small web-based monitoring dashboard for linux. (Source Code)

• Riemann - Flexible and fast events processor allowing complex events/metrics analysis. (Source Code (⭐4.2k))

• rtop (⭐2k) - an interactive, remote system monitoring tool based on SSH. (Source Code (⭐2k))

• Thruk - Multibackend monitoring web interface with support for Naemon, Nagios, Icinga and Shinken. (Source Code (⭐384))

• Zabbix - Enterprise-class software for monitoring of networks and applications. (Source Code)

Software / Network Configuration Management

• GNS3 - Graphical network simulator that provides a variety of virtual appliances. (Source Code (⭐1.7k)) GPL-3.0 Python

• Oxidized (⭐2.2k) - Network device configuration backup tool. Apache-2.0 Ruby

• phpIPAM - Open source IP address management with PowerDNS integration. (Source Code (⭐1.8k)) GPL-3.0 PHP

• RANCID - Monitor network devices configuration and maintain history of changes. (Source Code (⭐77)) BSD-3-Clause Perl/Shell

• rConfig - Network device configuration management tool. (Source Code (⭐102)) GPL-3.0 PHP

Software / Newsletters

• DadaMail - Mailing List Manager, written in Perl.

• Lewsnetter (⭐315) - E-mail marketing application (create and send e-mail newsletter via SES). Includes subscription management, delivery, bounce and complaint notification, templates, and some stats.

• LibreMailer (⭐24) - Libre Mailer is a modest and simple web based email marketing application.

• phpList - Newsletter manager written in PHP.

Software / Packaging

• fpm (⭐11k) - Versatile multi format package creator.

• omnibus-ruby (⭐1.2k) - Full stack, cross distro packaging software (Ruby).

• packman - Full stack, cross distro packaging software (Python).

• tito (⭐356) - Builds RPMs for git-based projects.

Software / Queuing

• ActiveMQ - Java message broker.

• BeanstalkD - A simple, fast work queue.

• Gearman - Fast multi-language queuing/job processing platform.

• Kafka - Extremely high performance publish/subscribe message system.

• NSQ - A realtime distributed messaging platform.

• RabbitMQ - Robust, fully featured, cross distro queuing system.

• ZeroMQ - Lightweight queuing system.

Software / Service Discovery

• Consul - Consul is a tool for service discovery, monitoring and configuration.

• Doozerd (⭐3.3k) - Doozer is a highly-available, completely consistent store for small amounts of extremely important data.

• etcd (⭐42k) - distributed K/V-Store, authenticating via SSL PKI and a REST HTTP Api for shared configuration and service discovery.

• ZooKeeper - ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services.

Software / Software Containers

• LXC - Userspace interface for the Linux kernel containment features.

• OpenVZ - Container-based virtualization for Linux.

Software / Troubleshooting

• grml – bootable Debian Live CD with powerful CLI tools.

• mitmproxy - A Python tool used for intercepting, viewing and modifying network traffic. Invaluable in troubleshooting certain problems.

• mtr - Network utility that combines traceroute and ping.

• perf-tools (⭐8.8k) - Performance analysis tools based on Linux perf_events (aka perf) and ftrace.

• Sysdig - Capture system state and activity from a running Linux instance, then save, filter and analyze.

• Wireshark - The world's foremost network protocol analyzer.

Software / Version control

• Fossil - Distributed version control with built-in wiki and bug tracking.

• Git - Distributed revision control and source code management (SCM) with an emphasis on speed.

• GNU Bazaar - Distributed revision control system sponsored by Canonical.

• Mercurial - Another distributed revision control.

• Subversion - Client-server revision control system.

Software / VPN

• ocserv - Cisco AnyConnect-compatible VPN server

• OpenVPN - Uses a custom security protocol that utilizes SSL/TLS for key exchange.

• Pritunl - OpenVPN based solution. Easy to set up.

• SoftEther - Multi-protocol software VPN with advanced features

• strongSwan - Complete IPsec implementation for Linux.

• tinc - Distributed p2p VPN.

Software / Web

• Algernon - Web/application server that supports Lua, live-reload, templates, Sass and HTTP/2.

• Caddy - Lightweight, general-purpose web server supporting HTTP/2, automatic TLS and easy configuration. Written in Go.

• Cherokee - Lightweight, high-performance web server/reverse proxy.

• Hiawatha - Prioritises security, simplicity and performance.

• Lighttpd - Web server more optimized for speed-critical environments.

• Nginx - Reverse proxy, load balancer, HTTP cache, and web server.

• uWSGI (⭐3.2k) - The uWSGI project aims at developing a full stack for building hosting services.

• HAProxy - Software based load Balancing, SSL offloading and performance optimization, compression, and general web routing.

• Varnish - HTTP based web application accelerator focusing on optimizing caching and compression.

Blogs / Web

• Code as Craft - Etsy's Ops blog, lots of technical posts.

• DevOpsGuys - Devops consultants who blog about operations.

• Rackspace Developers - Slightly biased blog with lots of Devops Topics.

• RoseHosting Blog - Linux tutorials for installing and configuring various software through the Linux command line. Guides and introductions to different Linux technologies and applications. Tips and tricks you can do via the Linux command line and more.

Books / Web

• The Linux Command Line - A book about the Linux command line by William Shotts.

Communities / Forums / Web

• ArsTechnica OpenForum – IT Forum which is attached to a large news site.

• Reddit - Really, really large bulletin board system.
  • /r/Linux - News and information about Linux.
  • /r/LinuxQuestions
  • /r/SysAdmin

• Spiceworks Community – General enterprise IT news and small articles.

• StackExchange Network – Q&A communities.
  • Server Fault – StackExchange community for system and network administrators.

Newsletters / Web

• Servers for Hackers - Newsletter for programmers who find themselves needing to know their way around a server.

• Web Operations Weekly - A weekly newsletter on Web operations, infrastructure, performance, and tooling, from the browser down to the metal.

Repositories / Web

• AlternativeTo - Find alternatives to software you know and discover new software.

• ElRepo - Community Repo for Enterprise Linux (RHEL, CentOS, etc).

• EPEL - Repository for RHEL and compatibles (CentOS, Scientific Linux).

• IUS - Community project that provides RPM packages for newer versions of select software for Enterprise Linux distributions.

• Remi - Repository with LAMP updated packages for RHEL/Centos/Fedora.

• Software Collections - Community Release of Red Hat Software Collections. Provides updated packages of Ruby, Python, etc. for CentOS/Scientific Linux 6.x.

Websites / Web

• ArchWiki – Arch Linux Wiki which has really nice written articles valid for other distros.

• Gentoo Wiki - Gentoo Linux Wiki with a lot in-detail description of Linux components.

• Awesome SysAdmin @ LibHunt - Your go-to SysAdmin Toolbox. Based on the list here.

• Ops School - Comprehensive program that will help you learn to be an operations engineer.

• Digital Ocean Tutorials - A surprisingly vast resource for getting the basics of certain applications, tools, or even systems administration topics.

Jul 01, 2016

Software / Remote Management

• X2go - X2Go is an open source remote desktop software for Linux that uses the NX technology protocol.

Mar 22, 2016

Software / Remote Management

• Remmina - A Feature rich remote desktop application for linux and other unixes.